Assignment 2 Database Management Systems - 1167 Words

Assignment-2 Database Management Systems General Database Concepts 1. Describe the types of facility you would expect to be provided in a multi-user DBMS. Data Storage, Retrieval and Update. A User-Accessible Catalog. Transaction Support. Concurrency Control Services. Recovery Services. Authorization Services. Support for Data Communication. Integrity Services. Services to Promote Data Independence. Utility Services. 2. Discuss the differences between DDL and DML? What operations would you typically expect to be available in each language? Data Definition Language (DDL) statements are used to define the database design or schema while Data Manipulation Language (DML) statements are used to manage data with Schema objects. In DDL, we have operations like CREATE: To create objects in database. ALTER: Alter the structure of the database. DROP: Delete objects from database. TRUNCATE: Removing all records from the table. COMMENT: Add comments to the data dictionary. RENAME: rename the object. In DML, we have operations like SELECT: Retrieve data from the database. INSERT: Insert data into the table. UPDATE: Updates existing table. DELETE: Deletes all the records from the table, the space for the record remain. MERGE: UPSERT operation (insert or update) CALL: Call a PL/SQL or java program. 3. Name four object-based data models. Object and Object identifier Attributes and methods Class ClassShow MoreRelatedAssignment: File System and Master File1570 Words   |  7 PagesBusiness System Amity Campus Uttar Pradesh India 201303 ASSIGNMENTS PROGRAM: BSc IT SEMESTER-II Subject Name Study COUNTRY Roll Number (Reg.No.) Student Name : : : : INSTRUCTIONS a) Students are required to submit all three assignment sets. ASSIGNMENT Assignment A Assignment B Assignment C DETAILS Five Subjective Questions Three Subjective Questions + Case Study Objective or one line Questions MARKS 10 10 10 b) Total weightage given to these assignments is 30%. 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